Brake for vehicles.



No. 655,390. Patented Aug. 7, I900. M. E. P. CHABUCHE BRAKE FOR VEHICLES.

(Application filed Mar. 15, 1900.) (N0 Model.) 3 $haats-Shaei I.

W/TNfSSfS: CO 5%[4 70/7 W V L; Aria/Mir No. 655,390. Patented Aug. 7, 1900. M. E. P. DHABOGHE.

BRAKE FOR VEHICLES. (Application fil d 113;. 15, 19011) 3 Sheets-Sheet 2,

(No Model.)

No. 655,390. Patented Aug. 7,1900. M. E. P. CHABOCHE.

BRAKE FOR VEHICLES.

(Application filed. Mar. 15, 1900.) v (No Model.) 3 Sheets-Sheet 3,

45 AUUHNEKL "NrTnn STATES AV-TENT OFFICE.

BRAKE FOR VEHICLES.

SPECIFICATION forming part of Letters Patent No. 655,390, dated August 7, 1900.

Application filed March 15, 1900. Serial No. 8,822. (No model.) 7

To all whom it may concern.-

Be it known that I, MARIE EDMOND PHIL- BERT OHABOOHE, engineer, a resident of 35 Rue Rodier, Paris, in the Republic of France, have invented a new and useful Improvement in or Relating to Brakes for Vehicles and for other Purposes, which is fully set forth in the following specification.

The present invention relates to brakes for vehicles and for other purposes. The ordinary band-brake comprises a drum or pulley connected to a journal, axle, or other relatively-movin g part,so as to be rotated thereby, and a band made fast to some relatively-fixed part at one end and passing around the drum to be connected to a lever or operating device at its other (free) end. When the attendant by manipulating the lever takes up the slack at the free end of the band, so as to tighten it around the drum, (in the direction of rotation of the latter,) the drum engages the band by reason of the friction and pulls upon its fixed end, the enormous friction thus produced serving as a most efficient brake, while only a slight effort is required to apply the brake-power. Such a device has certain defects in connection with an automobile or other vehicle, because when the vehicle is moving backward the action of the drum would be to pull on the free end of the band against the operating-lever, 850., while that portion of the band next to its fixed end would become slack. The operating mechanism could not stand the strain, nor is there anything to take up the slack. In other words, such a device is not operative when the vehicle is going backward. For the same reason the device is equally ineffective in case it'is desired to apply the brake when the vehicle is brought to a temporary standstill on an ascent. An effort has been made to meet this inconvenience by arranging props adapted to be lowered in contact with the ground in order to prevent or stop backward movement, and some automobile Vehicles have been provided with two brake-bands, one for the forward movement and the other for the backward movement of the vehicle. This certainly is a solution of the problem, but a solution which involves an increase as regards weight and on the part of the attendant an increase as regards parts to be attended to.

The present invention relates to a bandbrake actuated by a single operating device, said brake being effective when applied either during forward movement or during reverse movement; audit consists,briefly,in passinga band around the drum and securing it at each end with a considerable slack to a relativelyfixed portion of the vehicle and providing means for tightening the band around the drum, whereupon the rotation of the drum in either direction will take up the slack on the opposite side, the result in either case being the application of tremendous braking power, requiring only a slight effort'on the part of the attendant.

In the drawings, Figure l is an elevation of the principal parts of the brake. Fig. 2 is a plan view of the same, certain parts being removed; and Fig. 3 is a vertical transverse section. Fig. 4: is a partly-broken elevation, and Fig. 5 a transverse section, illustrating modified means for operating the toggle; and Fig. 6 shows 'details.-

Reference-letter a indicates a pulley or drum fast to shaft 1), to which the brakepower is to be applied. A brake-band a (located in a groove) encircles the drum, the band proper extending from a point 01 down ward and up around to a pointf and has two overlapping continuations c and 6. One continuation or cable, as c, is secured at one end to the band a, as at d, and at its other end to an anchoring-chain h, the latter made fast at its other end to some suitable relatively-fixed point. Similarly the other cable 6 is secured to the band at fand to another chain 9, made fast to some suitable point opposite to chain it. As a convenient mechanical device I have provided the movable members or blocks cl and f, to which the chains g and h, respectively, are secured. One cable, as c, is made fast to block f and passes freely under block cl, as at c in Fig. 5, to be secured to the ad j acent end of band a, while the other cable e is secured to block d, as at e in Fig. 5, and passes freely under block f to be secured to the adjacent end of the band a.

It is to be understood that the band a. eucircles the drum loosely and that the chains g and hare slacki. e., are not fully stretched or taut. Consequently the drum or and its shaft b can rotate freely. If,.however, the

it is rotating, so that the brake-power is applied in either direction of rotation.

Any suitable means may be provided for tightening the band around its drum, preferably a toggle, to force the blocks away from each other. Referring to Figs. 1 to 3, toggle members i and j are pivoted at their outer ends to blocks f and (1, respectively, and at their other ends to head is. Head is has a tubular member Z, telescoping with a tube m,

carried by a collar 0, that fits freely on the hub 19 of drum a. Blocks (1 and fare thus relatively movable around the circumference of pulley a, and they may be connected to collar 0, as by pivoted links 3 and r, respectively, though these links may be dispensed with, as they serve merely to guide the movement of the blocks more exactly. A cord or cable secured to member Z and extending through member m, passes around a transverse -pulley q, mounted on collar- 0 within convenient reach of the attendant. Pulling on this cord draws head 70 down, spreading the toggle out and applying the brake, while a spring, as 15, serves to close the toggle to release the brake automatically when the cord v 70 is released. 1

If cord is be pulled when the pulley d is rotating in the direction indicated by arrow 1 of Fig. 1, the band is tightened around its drum a, and the latter then pulls on block 01 and swings the whole toggle arrangement to the left to the limit of its angular play, which is determined by the stretching or tautening of chain g. Similarly when the pulley is rotating in the opposite direction, as indicated by arrow 2, the pull is upon chain h, so that in either case by the same operation of the attendant the brake-power is applied.

Figs. 4 to -6 illustrate another construction for spreading the toggle to tighten the band and apply the brake-power. In this modification a rod m is secured rigidly to the collar, as shown, and carries a transverse rockshaft u, on the outer end of which is fast an operating-lever 22, while each of the toggle members i and j is secured to one end of a bell-crank lever 26, secured on the inner end of the rock-shaft in such position that swinging of lever Q) to the left (in Fig. 4) spreads out the toggle, forcing blocks d and f away from each other to apply the brake, as in the other construction. lease the brake.

Having thus described my invention, I claim 1. The combination of a brake-drum, a continuous brakeband freely encircling the same and having its ends secured with limited play, and means for tightening said band around said drum whereby the rotation of the latter in either direction takes up the slack of the former and applies the brakepower, substantially as described.

2. The combination of abrake-drum, a continuous brake -band freely encircling the same and having its ends secured with limited play, and a toggle for tightening said band around said drum whereby the rotation of the latter in either direction takes up the slack of the former and applies the brakepower, substantially as described.

3. The combination of a brake-drum, a brake-band encircling the same and having its ends secured with limited play, a toggle whose free ends are secured to the opposite ends of said band and to limiting-chains, and means for spreading said toggle to tighten said band, substantially as described.

4. The combination of a brake-drum, a brake-band encircling the same. a toggle having its ends secured to the opposite ends of said band and having alimited angular move ment relative to said drum, and means for spreading said toggle to tighten said band around said drum, substantially as described.

5. The combination of a brake-drum, a brake-band encircling the same, a toggle having its ends secured to the opposite ends of said band and having a limited angular move- A spring m serves to rement relative to said drum, means for spreading said toggle to tighten said band around said drum, and an automatic device for reclosing said toggle,substantially as described.

6. The combination of a brake-drum, a brake-band encircling the sameand having its ends secured with limited play, and means for tightening said band around said drum, the same consisting of toggle members pivoted respectively to the opposite ends of said band and having their inner ends carried on a head adapted to be telescoped radially of said drum, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

MARIE EDMOND PIIILBERT GHABOCHE.

Witnesses:

ALrHoNsE EMILE VERGE, EDWARD P. lVIACLEAN. 

